selenium

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se·le·ni·um

(sĭ-lē′nē-əm)

n. Symbol Se

A nonmetallic element, red in powder form, black in vitreous form, and metallic gray in stable crystalline form, resembling sulfur and found as an impurity in pyrites or obtained as a byproduct of electrolytic copper refining. It is widely used in rectifiers, as a semiconductor, and in xerography. Its photovoltaic and photoconductive actions make it useful in photocells, photographic exposure meters, and solar cells. Atomic number 34; atomic weight 78.96; melting point (gray) 221°C; boiling point (gray) 685°C; specific gravity (gray) 4.79; (vitreous) 4.28; valence 2, 4, or 6. See Periodic Table.

[Greek selēnē, moon (from selas, light, brightness) + -ium.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

selenium

(sɪˈliːnɪəm)

(Elements & Compounds) a nonmetallic element that exists in several allotropic forms. It occurs free in volcanic areas and in sulphide ores, esp pyrite. The common form is a grey crystalline solid that is photoconductive, photovoltaic, and semiconducting: used in photocells, solar cells, and in xerography. Symbol: Se; atomic no: 34; atomic wt: 78.96; valency: –2, 4, or 6; relative density: 4.79 (grey); melting pt: 221°C (grey); boiling pt: 685°C (grey)

[C19: from New Latin, from Greek selēnē moon; named by analogy to tellurium (from Latin tellus earth)]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

se•le•ni•um

(sɪˈli ni əm)

n.

a nonmetallic element occurring in several allotropic forms and having an electrical resistance that varies under the influence of light. Symbol: Se; at. wt.: 78.96; at. no.: 34; sp. gr.: (gray) 4.80 at 25°C, (red) 4.50 at 25°C.

[< New Latin (1818) < Greek selḗn(ē) moon + New Latin -ium -ium²]

se·le·ni·um

(sĭ-lē′nē-əm)

Symbol Se A nonmetallic element that can exist as a gray crystal, a red powder, or a black glassy material. It can convert light directly into electricity, and its ability to conduct electricity increases as light striking it becomes more intense. Because of this, selenium is used in copy machines, photography, and solar cells. Atomic number 34. See Periodic Table.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Noun

selenium - a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)

atomic number 34, Se

chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

fool's gold, iron pyrite, pyrite - a common mineral (iron disulfide) that has a pale yellow color

antioxidant - substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides

Translations

селен

selen

Selen

selenio

seleen

seleeni

sélénium

selenij

szelén

selen

selenio

セレン

seleenselenium

selen

селен

selen

селен

selenium

[sɪˈliːnɪəm] N → selenio m

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

selenium

n → Selen nt

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

selenium

n selenio

References in periodicals archive ?

Rayman, "The use of high-selenium yeast to raise selenium status: how does it measure up?" The British Journal of Nutrition, vol.

Selenium and Thyroid Disease: From Pathophysiology to Treatment

Chemists look at reagents containing the less researched (compared to sulfur) chalcogen elements selenium and tellurium.

Selenium and Tellurium Reagents: In Chemistry and Materials Science

The "Selenium Mining Global Market Report 2019" report has been added to ResearchAndMarkets.com's offering.

Global Selenium Mining Market Report 2019: Historical Data & Forecasts 2014-2022 Featuring American Elements, Hindalco Industries, Mitsubishi Materials Corp, Sumitomo Metal Mining, Umicore

WHAT HAPPENS IF SOMEONE DOESN'T CONSUME ENOUGH SELENIUM?

Know Your Nutrient: SELENIUM

During the study, egg white, egg yolk and total egg selenium, as well as egg production, initially increased for low- and medium-dose groups and then plateaued.

Effects of Dietary Supplementation of Selenium Enriched Yeast on Egg Selenium Content and Egg production of North China Hens

In the original study, 443 men and women, average age 78 upon enrollment, received a placebo or CoQ10 plus selenium daily for 48 months.

CoQ10 and Selenium Linked to Lower Mortality Risk

Since a lot of foods contain selenium, only those who are hospitalized, those who have malnutrition, those who have special diets, or have chronic illness such as HIV are possible to be selenium-deficient.

Let's get serious about Selenium

There are several potential options to improve human selenium intake, including dietary modification and diversification or direct Se supplementation.

Long-Term Supplementation of Laying Hen Diets with Various Selenium Sources as a Method for the Fortification of Eggs with Selenium

The geldings that received selenium, mineral and vitamin supplements and special feed had an appropriate level of selenium in the blood.

THE EFFECT OF SELENIUM ON PROPER BODY FUNCTION IN HORSES

kosmik is Selenium is an open source tool for web application testing.

selenium training in hyderabad / selenium training institutes in hyderabad

The Prevention of Alzheimer's Disease by Vitamin E and Selenium (PREADViSE) trial was piggybacked onto a larger randomised controlled trial looking at the antioxidant effects of selenium and vitamin E on the incidence of prostate cancer.